ver. 1.1 / 2020

GUIDE FOR OFFICE LIGHTING OPTICS

KUV

HOW TO REDUCE GLARE

GLAREGlare is the sensation of visual discomfort caused by areas that are too bright within the field of vision, such as lit surfaces, parts of luminaires, windows and/or ceiling. Glare should be limited to avoid fatigue, discomfort and accidents.

UGR Discomfort Glare Criterion

10 and under Imperceptible

13 Barely perceptible

16 Perceptible (suitable for accurate eye tasks)

19 Barely acceptable (suitable for average eye tasks)

22 Unacceptable (suitable for moderate eye tasks)

25 Barely uncomfortable (suit-able for simple eye tasks)

28 and over Uncomfortable

BEAM

OUTPUT

SURFACE

PLACEMENT

VISIBILITY

AMBIENT LIGHT

Limit light intensity above potential glare angles

Decrease light output (might require adding more

luminaires)

More uniform surface luminance with same lumen

output

Avoid glare on task area and increase ambient light

Shading and shielding

Less contrast Eyes adapt to brightness more easily

80%

DIRECT (A): Bright lamps – measurable and has a clear affect to performanceREFLECTED (B & C): Reflection of light on specular high gloss surfaces

DISABILITY: Affects visual performance – can be measuredDISCOMFORT: Subjective evaluation; feels uncomfortable but does not necessarily affect visual performance

TYPES OF GLARE

A B C

37o

TAKE VISUAL PERFORMANCE, VISUAL COMFORT AND VISUAL AMBIENCE INTO ACCOUNT TO ACHIEVE THE RIGHT LIGHT FOR SPECIFIC SPACE

OFFICE LIGHTING IN A NUTSHELLOffices consist of many different types of rooms and areas: work areas, public areas, hallways, meeting rooms, showrooms, kitchens, places for relaxation – each requiring a different kind of lighting. Some spaces must follow specific criteria while other areas can be illuminated with much more freedom. Besides visual comfort, people’s wellbeing and safety are important considerations and lighting can also be directly linked to productivity. Today’s advanced electronic controls can follow different phases of the day and balance artificial lighting levels with natural light. Using warmer tones and low intensity at the beginning and end of the day can lower stress, and using cooler tones during the day can be energizing. This is all part of Human Centric Lighting philosophy and is very important, even vital, especially indoors where we spend many hours a day in artificially lit environments.

LIGHTING LEVEL COLOUR RENDERING

UNIFORMITY

SHADOWS

DIRECTION

COLOUR

GLARE

PE

RFO

RMANCE

CO

MFO

RT

GOOD LIGHTING

AMBIENCE

TIPS FOR MODERN AND PLEASANT OFFICE LIGHTING

5TIPS FORBETTER OFFICELIGHTING

AIM HIGH Studies show that good office lighting increases productivity and wellbeing as well as boosting creativity. They also show that people place great value on good workplace lighting and many are unhappy with their current office lighting. Controlling lighting to replicate natural daylight patterns helps peoples natural circadian rhythm improving overall wellbeing, motivation and productivity.

DESIGN FOR THE ENVIRONMENTApplying the traditional room-related lighting concept of a 500 lux blanket no longer

meets the needs of the modern office or the modern worker, both of which require variety and contrast. Thanks to LED technology, office lighting can be

designed to enhance atmosphere and décor as well as create contrasts and different moods. This in turn allows much greater flexibility when

designing the overall office layout than would be possible with a traditional 500 lux blanket.

DARK LIGHT, BRIGHT SURFACE, OR INDIRECT?Many offices are lit with bright surface luminaires. This is often perfectly adequate in spaces that have a lot of natural day light and light-coloured décor. However, in many cases this type of lighting is not ideal as it also creates unpleasant glare.

Well-shielded dark light luminaires on the other hand are discreet, and the distracting light source cannot be seen, even when they are on. Dark light creates a much more pleasant and natural working environment by eliminating distracting bright luminaires that often dominate the

workspace.

Indirect light can be used to create different moods and effects depending on requirement and task. However in many

environments it is ideal to combine indirect light such as wall washers and up-light with direct lighting. This will create a bright and

airy atmosphere while reducing glare from bright luminaires.

LUMINAIRE PLACEMENTLuminaires in a typical open office are often placed next to walls to achieve

sufficient lighting levels on the walls. However, when desks are placed in the office lighting is not always a consideration, and some employees might find they are subjected to direct

and indirect glare. A good office and lighting design plan is essential to ensure light can be adjusted according to the task and the individual.

MINIATURIZATIONLEDs enable smaller, modern and fresh designs for a lower cost. However such designs can be too bright and cause glare if suitable optics designed for office environments are not used. Miniaturized designs with a full range of beams gives you the tools to be more creative than ever.

LINEAR OFFICE LIGHTING SETUPS3

ROOM RELATED LIGHTING CONCEPT WITH RECESSED DIRECT LIGHT

TASK RELATED LIGHTING CONCEPT WITH SUSPENDED LUMINAIRES

RECEPTION LIGHTING - FIRST IMPRESSION MATTERS

Check more details at www.ledil.com/application-areas/office-lighting/

FLORENTINADiscreet direct light for meeting rooms, receptions,

task lights and down lights.Part of LEDiL’s Dark Light (UGR <16) product family.

A hybrid design of black reflector and lens for high visual comfort in various shapes.

BW MRK-BWWM

BEAMS FOR OFFICE LIGHTING

FLORENCE-3RFLORENCE – For general office lighting with shade or high level of ambient lightFLORENCE2 – For direct lighting in common areas, corridors and warehouses3-row (Zhaga book 7) linear lenses with market leading colour uniformity. Wide selection of beams and accessories compliant with a range of mid- and high-power LEDs and LED clusters.

Z90

O

Z60

BEAMS FOR OFFICE LIGHTING

LINNEAFor direct lighting in corridors and warehouse areas. For ambient up-light and wall-wash effects.285 x 40 mm linear lenses with integrated clip fixing optimized for the most common Zhaga mid-power 20 and 24 mm wide PCBs.

*RONDA-REC-60 and -90

ZT25UP

BEAMS FOR OFFICE LIGHTING

SINGLE LENSES & REFLECTORSIn addition there are lots of different single lenses and reflectors available for downlighting.

M W WWW WAS BW*

Premium class office lighting with highly efficient lenses and a seamless shade that eliminates glare.

Discreet direct light for recessed, surface mounted

and suspended office luminaires.

FEATURES Six sizes :

180 x 40 mm :4X1280 x 40 mm :7X1

12" (305 x 38 mm) :8X11140 x 40 mm :28X179.4 x 79.4 mm :2X2

280 x 21 mm :MINI

High efficiency >85 % (even with the shade)

Available in black , white and metal with gloss

or matt finish

COMPATIBILITYOptimized for 2835 and

compatible with up to 5630 size mid-power LED packages

DAISYDARE NOT TO GLARE

DAISY-MINI-M DAISY-MINI-W DAISY-MINI-WW

~30° ~55° ~65°

COMING COMING

DAISY-XXX-WW

~80°

DAISY-XXX-W DAISY-7X1-W2

~50° ~50° XXX

= 4X

1, 7

X1,

8X1,

28X

1 or

2X2

PATENTED

TECHNICAL SUPPORTSimulations to show optic performance in real applications

Installation guides and tips

Thermal analysis for luminaire designs

Free for all our customers

tech.support@ledil.com (GLOBAL)tech.support.us@ledil.com (NORTH AMERICA)tech.support.rus@ledil.com (RUSSIA)

TYPICAL OFFICE LUMINAIRES

DIRECT LIGHTING INDIRECT LIGHTINGDIRECT / INDIRECT

LIGHTING

WALL-WASHINGTASK LIGHTING

Recessed or surface mounted Suspended luminaire Suspended luminaire

Recessed, surface mounted or cove light

Track light, downlight or free standing

Ledil OyJoensuunkatu 1324100 SALOFINLAND

Ledil, Inc.228 West Page Street Suite DSycamore IL 60178USA

Ledil Optics Technology (Shenzhen) Co., Ltd.# 405 , Block B Casic Motor Building Shenzhen 518057 P.R.CHINA

www.ledil.com

The information contained herein is the property of LEDiL Oy, Joensuunkatu 13, FI-24100 SALO, Finland, and is subject to change without prior notice. Please visit www.ledil.com for additional information, such as the latest photometric files, 3D mechanical models, and application notes relating to handling, gluing and taping. LEDiL products are IPR protected.